Reciprocating Action Universal Receiver Test System

ABSTRACT

A firearm reciprocating and locking bolt and associated barrel, utilized in and with a locking firearm action, that places fixed ammunition and its associated chamber down-bore effectively past the constraints of the receiver.

CROSS-REFERENCE TO RELATED APPLICATIONS

Provisional Patent Application No. 62/392,055

Filing Date: May 20, 2016

STATEMENT REGARDING FEDERALLY SPONSORED RESEARCH AND DEVELOPMENT

N/A.

THE NAMES OF THE PARTIES TO A JOINT RESEARCH AGREEMENT

N/A.

INCORPORATION-BY-REFERENCE OF MATERIAL SUBMITTED ON A COMPACT DISC OR AS A TEXT FILE VIA THE OFFICE ELECTRONIC FILING SYSTEM (EFS-WEB)

N/A

STATEMENT REGARDING PRIOR DISCLOSURES BY THE INVENTOR OR A JOINT INVENTOR

No disclosure of this invention was made at any time before the provisional patent filing date of May 20, 2016.

BACKGROUND OF THE INVENTION (1) Field of the Invention

Pressure Testing of Smallarm Ammunition

(2) Description of Related Art

A falling block Universal Receiver is capable of accepting pistol, rifle, shotshell or rim fire pressure-test barrels. This same Universal Receiver Action provides for direct access of electronic and non-electronic pressure measurement devices mounted directly over and/or into the specific cartridge/chamber region of the test barrel. However, the falling block designed Universal Receiver is expensive. The manufacture of such falling block Universal Receiver is highly involved. The weight of such falling block Universal Receiver is cumbersome. Parts are not readily available.

A common reciprocating-action receiver can be utilized to pressure-test “rifle” ammunition, because the chamber of a rifle cartridge can extend out past the forward receiver ring of a reciprocating-action receiver. Therefore, an electronic or non-electronic pressure measurement device can be placed directly over and/or into the specific cartridge/chamber region of the test barrel, without also drilling, threading or otherwise compromising the reciprocating-action receiver. Likewise, any number of chambered test barrels can individually be screwed or otherwise attached to a reciprocating-action receiver, so long as the relationship of chamber and bolt face maintain correct “head space”. Thus, a single reciprocating action receiver could function as a universal receiver for “rifle cartridges”.

However, the forward location of the bolt face incorporated in a standard reciprocating-action centerfire rifle firearm receiver is within the housing of the receiver ring. This bolt face location prevents this same firearm receiver action from providing direct access to pistol, rim-fire and shot shell chambers, at the location of their respective “pressure chamber”. This standard bolt face location precludes reciprocating-action receivers from being used as “Universal Receivers” for all smallarm ammunition.

Firearm receivers such as break-action and Baumann-type (U.S. Pat. No. 3,996,684) forward-biased bolt face receivers are incapable of withstanding the high pressures generated in 65000-psi intended centerfire rifle cartridges.

BRIEF SUMMARY OF THE INVENTION

A reciprocating and locking bolt body for a firearm receiver. The invention is a modified bolt, and associated modified gun barrel(s), whereby the location of the locking interface between the bolt body and action receiver remain unchanged, but the bolt face is extended even with or past the opening face of the action receiver ring. This modified bolt face location allows pistol, rim-fire or shot shell chambers to be placed forward of the firearm receiver/barrel junction, and thus provide for direct access of electronic and non-electronic pressure measurement devices mounted directly over and/or into the barrel of any cartridge/chamber region under test. The firearm receiver remains entirely intact and unaltered from prior art design and intent. The firearm receiver remains entirely capable of withstanding chamber pressures in excess of 65,000-psi.

BRIEF DESCRIPTION OF THE SEVERAL VIEWS OF THE DRAWING(S)

FIG. 1.

FIG. 1a . Claimed bolt body, showing bolt face and bolt lug location relationship.

FIG. 1b . Prior art bolt body, showing bolt face and bolt lug location relationship.

FIG. 2.

FIG. 2a . Incorporation of claimed bolt body into prior art action receiver, bolt lugs unlocked with action lugs.

FIG. 2b . Incorporation of claimed bolt body into prior art action receiver, bolt lugs locked with action lugs.

FIG. 3. Prior art bolt, prior art pistol cartridge, in prior art action receiver.

FIG. 4.

FIG. 4a . Claimed bolt, showing bolt face located beyond constraints of the threaded and lugged prior art action receiver ring.

FIG. 4b . Claimed bolt, fit into claimed recessed chamber. Threaded transducer hole is beyond the constraints of the threaded portion of the barrel/receiver interface and normal to firearm chamber.

FIG. 5. Whole View

DETAILED DESCRIPTION OF THE INVENTION

The claimed bolt incorporated into a prior art firearm action receiver has an extended face-to-lug relationship, such that the face of the bolt that touches/pushes the cartridge into the chamber, when in forward and locked position, extends to or beyond the end of the firearm action receiver ring. The effective length of the claimed bolt body enables a prior art and economical long-action firing pin to be utilized within the bore of the claimed bolt body.

Of necessity, any such barrel joined with a prior-art receiver, and utilizing this elongated face-to-lug relationship claimed bolt, must be cut with a recessed chamber. The individual modified bolt, as well as the required and modified location of the recessed chamber are both claimed within the constraints of the invention.

Together, the elongated bolt and recessed chamber are utilized to fire a cartridge beyond the constraints of the firearm receiver. In achieving this relationship, one individual, economical, lightweight, common-place firearm action receiver is now capable of interfacing with any number of ammunition test barrels, and any number of calibers, whereby electronic or non-electronic measurement devices can be placed beyond the action receiver, and those measurement devices placed directly over or into the specific chamber, measuring direct chamber pressure, without altering the material strengths nor function of the firearm receiver. The preferred embodiment permits a bolt-action receiver forward threaded ring to remain entirely intact and unaltered from prior art design and intent. 

What is claimed is:
 1. A reciprocating and locking bolt action firearm bolt, having a total length and geometry whereby the face of the bolt, when prior art bolt lugs are locked to any prior art bolt action receiver, extends substantially equal to or past the most forward location of a prior art bolt action firearm receiver, being made of metal alloy, incorporating a prior art firing pin, prior art bolt handle, prior art firing pin spring, prior art bolt diameters, prior art bolt lug location, and functions to lock the receiver-bolt interface and fire a cartridge as a prior art firearm receiver action and prior art bolt is intended, to chamber pressures in excess of 65,000 pounds per square inch.
 2. A recessed chamber, whereby when located in a threaded gun barrel, and that barrel fully screwed into a prior art threaded receiver action, and that receiver action fit with the claimed bolt, places it substantially equal to or past the most forward location of an attached threaded firearm receiver, and permits the location of a prior art pressure measurement device past the most forward location of a prior art receiver. 